I moved the tripod six or seven feet closer to the feeders this evening when I got home, but then used less zoom to keep both of them in the shot. Played around with focus, both auto and manual, for a little bit with the rest of the settings full auto. At this point I'm pretty certain that I can't manually focus the camera better than it can do on its own, assuming that it has a good point to focus on. The quality is astonishing to me.
It seems that moving the camera closer to the feeders made some of the birds more skittish. I didn't get many shots with birds at all, let alone the black capped chickadees and the larger white and black bird I want to identify. I did manage a couple of decent shots though. Both are cropped tight but otherwise unaltered(click images for full size):
A brave male cardinal.
A pair of house sparrows(pretty sure). The male is in the front.